'H is for haircut, M is for Mirza' - The A-Z of WTA Finals in Singapore

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A is for age-defying.

Serena Williams was 33 years old when she won the 2014 title in Singapore, making her the oldest champion in the tournament's history. Another record was set by a Williams sister in the city - Venus was 37 years old when she reached the final in Singapore last year, becoming the oldest finalist in the tournament's history. (Getty)

Singapore hosts its fifth WTA Finals this week. Here we take a fond and fun look back on memorable moments from the previous four years before the move to Shenzhen.